Speedmaster intake porting. Hopefully I can make something out of this
I'm naturally prejudiced...but I woulda never put money on the SM intake over the Elder-brock. Why? The SM intake, to me, is someone's attempt at taking market share away from companies who are already doing a good job of serving the market. In other words, it's a solution to a problem that didn't exist. That tells me it wasn't created for the right reasons (i.e. someone sought to offer a better product). Products like that seldom, if ever, are satisfying.
A few other examples....the Chinese knock-offs of Japoanese dirt bikes. The complete degradation of the go-kart market due to cheap knock-offs. The knock-off HEI distributors on Ebay for $69. The list goes on and on...
I also think there's only so much you can do with a dual plane intake, but that's another story...